Moorpark is a city in Ventura County in Southern California. Moorpark was founded when the application for the Moorpark Post Office was granted on June 1, 1900. The townsite of Moorpark was owned and surveyed by Robert Poindexter and his wife, Madeline. The town has experienced a great amount of growth since the late 1970s. The population was 34,421 at the 2010 census, up from 31,415 at the 2000 census.